Donald Trump's son Eric 'excited' as he announces he's expecting first child with wife Lara

Lara Trump (L) and Eric Trump attend the Elvis Trumps Cancer Walk Benefiting St. Jude Children's Research Hospital at Cadman Plaza on September 26, 2015 in New York City. (Photo by Mark Sagliocco/Getty Images)Ivanka Trump (R) dances with her husband Jared Kushner and Eric Trump dances with his wife Lara Yunaska during A Salute To Our Armed Services Inaugural Ball at the National Building Museum on January 20, 2017 in Washington, DC.Eric Trump (R) and his wife Lara Yunaska use their iPhones during a campaign rally in the Lakawanna College Student Union November 7, 2016 in Scranton, Pennsylvania.Eric Trump and Lara Trump attend the 9th Annual Eric Trump Foundation Golf Invitational Auction & Dinner at Trump National Golf Club Westchester on September 21, 2015 in Briarcliff Manor, New York. (Photo by Grant Lamos IV/Getty Images)Eric Trump (R) and his wife Lara appear at the star dedication ceremony for radio personality Elvis Duran on the Hollywood Walk of Fame on March 2, 2017 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)Eric Trump (R) and his wife Lara appear at the star dedication ceremony for radio personality Elvis Duran on the Hollywood Walk of Fame on March 2, 2017 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)Eric Trump (R) and his wife Lara appear at the star dedication ceremony for radio personality Elvis Duran on the Hollywood Walk of Fame on March 2, 2017 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)(L-R) Jared Kushner, Ivanka Trump, Lara Trump and Eric Trump watch the Inaugural Parade from the main reviewing stand in front of the White House on January 20, 2017 in Washington, DC. Donald J. Trump was sworn in today as the 45th president of the United States. (Photo by Patrick Smith/Getty Images)(L to R) Lara Trump and Eric Trump arrive at Trump Tower, January 13, 2017 in New York City. President-elect Trump continues to hold meetings at Trump Tower in New York. (Photo by Drew Angerer/Getty Images)US President-elect Donald Trump son Eric Trump (R) and his wife Lara leave the Trump Tower in New York on November 16, 2016. / AFP / Jewel SAMAD (Photo credit should read JEWEL SAMAD/AFP/Getty Images)Lara Yunaska(L), the wife of Eric Trump (C), and Melania Trump (R), wife of Donald Trump, applaud during a rally in the Air Wilmington Hangar at the Wilmington International Airport in Wilmington, North Carolina on November 5, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)(L-R) North Carolina Governor Pat McCrory, Lara Yunaska, Eric Trump and Melania Trump attend a campaign rally with Donald TrumpDonald Trump and his wife Melania (front right) and son Eric Trump and his wife Lara Yunaska arrive for a rally at Wilmington International Airport in Wilmington, North Carolina on November 5, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)Donald Trump's son Eric Trump and his wife Lara Yunaska attend the final night at the Republican National Convention at the Quicken Loans Arena in Cleveland, Ohio on July 21, 2016. / AFP / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)Eric Trump (R) along with his wife, Lara Yunaska, attend the third day of the Republican National Convention on July 20, 2016 at the Quicken Loans Arena in Cleveland, OhioLara Yunaska (L) and Eric Trump attend the 102nd White House Correspondents' Association Dinner on April 30, 2016 in Washington, DC. (Photo by Larry Busacca/Getty Images)(L-R) Donald Trump, Ivana Trump, Eric Trump and Lara Yunaska attend The Eric Trump 8th Annual Golf Tournament at Trump National Golf Club Westchester on September 15, 2014 in Briarcliff Manor, New York. (Photo by Dave Kotinsky/Getty Images)Eric Trump and Lara Yunaska attend The Eric Trump 8th Annual Golf Tournament at Trump National Golf Club Westchester on September 15, 2014 in Briarcliff Manor, New York. (Photo by Dave Kotinsky/Getty Images)Eric Trump (L) and Lara Yunaska pose for a picture with their dog at the 2013 Animal League America Celebrity gala at The Waldorf Astoria on November 22, 2013 in New York City. (Photo by Mike Coppola/Getty Images)Lara Yunaska and Eric Trump attend European School Of Economics Foundation Vision And Reality Awards on December 5, 2012 in New York City. (Photo by Craig Barritt/Getty Images for European School of Economics Foundation)Eric Trump, left, and his wife Lara Yunaska arrive for a New Year’s Eve party at Mar-a-Lago, Palm Beach, Florida. Image: AP Photo/Evan Vucci(L-R) Tiffany Trump (2nd L) and her guest Ross Mechanic (L), and Eric Trump and his wife Lara Yunaska watch as U.S. President Donald Trump cuts a cake during the inaugural Armed Services Ball at the National Building Museum January 20, 2017 in Washington, DC.(L-R) Eric Trump, Lara Yunaska Trump, Donald Trump, Barron Trump, Melania Trump, Vanessa Haydon Trump, Kai Madison Trump, Donald Trump Jr., Donald John Trump III, and Ivanka Trump pose for photos on stage after Donald Trump announced his candidacy for the U.S. presidency at Trump Tower on June 16, 2015Ivanka Trump (R) dances with her husband Jared Kushner and Eric Trump dances with his wife Lara Yunaska during the inaugural Freedom Ball at the Washington Convention Center January 20, 2017 in Washington, DC.

The 33-year-old businessman, who is running the Trump Organisation with older brother Donald Jr since their father's inauguration, said they first discovered the news on Eric's birthday in January.

The couple are expecting a baby boy and Lana, a former tv producer, said she was "exhausted in the beginning" but is now feeling stronger in her second trimester.

"It surprised me, because I’m a very active person, and until the fatigue hit, I didn’t believe it would actually happen to me," she told People.

Eric Trump (R) and his wife Lara appear at the star dedication ceremony for radio personality Elvis Duran on the Hollywood Walk of Fame on March 2, 2017 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

"It really affected me. But I’m feeling really good now."

The expectant mother said she "always wanted kids" and they are thinking of names for when the baby arrives.

Meanwhile, the Trumps are fresh from a trip to the upscale ski town of Aspen, Colorado and "everyone is complaining" as there are "so many of them" - including Ivanka, Donald Jr and Eric as well as their husbands and wives and eight children in addition to an estimated 100 Secret Service agents.

"They’re everywhere. There are so many of them. Everyone is complaining. Everyone is annoyed," a visiting New York mother told Vanity Fair.

Eric Trump (R) along with his wife, Lara Yunaska, attend the third day of the Republican National Convention on July 20, 2016 at the Quicken Loans Arena in Cleveland, Ohio